BSPP (G) — British parallel pipe
3/8-19 BSPP pipe thread: 19 TPI, major Ø 16.662 mm.
Profile
| Designation | 3/8-19 BSPP |
|---|---|
| Major (outside) diameter | 16.662 mm · 0.656" |
| Pitch | 1.337 mm · 19 TPI |
| Pitch diameter | 15.794 mm · 0.6218" |
| Minor diameter (external) | 15.022 mm · 0.5914" |
| Minor diameter (internal) | 15.215 mm · 0.599" |
| Recommended tap drill | — |
3/8-19 BSPP is a BSPP pipe thread running at 19 threads per inch on a 16.662 mm major diameter. BSPP (G) is a parallel thread sealed by a bonded washer or gasket, not by thread interference — so it has no tapered tap-drill sizing.
All values are generated from the standard thread formulas (ISO 68-1 / ASME B1.1) and published standard tables — not hand-entered. See the full reference.
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